Pat dry the chicken breasts on a cutting board and dice them into 1-inch pieces.
In a medium bowl, combine the chicken and seasoning and gently toss to combine.
Cook:
In a large skillet, set over medium-high heat, heat the oil. Add the seasoned chicken and sausage. Cook for 3 to 4 minutes, stirring frequently, until the chicken begins to brown. Add the bell peppers and red onion. Cook for 2 additional minutes, stirring frequently.
Add the drained tomatoes, breaking up any large pieces with a spoon. Stir in the cauliflower rice.
Reduce the heat to medium, cover, and cook until the chicken is no longer pink and the cauliflower rice has absorbed all liquid, about 5 minutes. Remove from heat and serve.